More evidence has emerged in Al Jazeera's investigation into performance-enhancing drugs, suggesting that a clinic in the United States might have been illegally prescribing human growth hormone.
Watch the full documentary - The Dark Side - here
The Guyer Institute in Indianapolis was featured in Al Jazeera's documentary on sports doping earlier this week. One of the allegations made by a pharmacy intern who worked at the Institute was that the clinic was shipping human growth hormone to the wife of American football star Peyton Manning.
Watch Deborah Davies' report above.
Find out more: Recording backs up Al Jazeera report
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